GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39500-B R-134a A/C Refrigerant Recovery, Recycling and Recharging System (ACR4)

Removal Procedure

  1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  2. Recover the refrigerant using the J 39500-B .
  3. Clean the valve seat area on the rear head.

  4. Object Number: 573960  Size: SH
  5. Remove the pressure relief valve (1).

Installation Procedure

  1. Lubricate the O-ring of the new pressure relief valve (1) using new 525 viscosity refrigerant oil.
  2. Notice: Refer to Component Fastener Tightening Notice in the Preface section.


    Object Number: 573960  Size: SH
  3. Install the pressure relief valve (1).
  4. Tighten
    The pressure relief valve to 9 N·m (80 lb in).

  5. Evacuate and recharge the system using theJ 39500-B .
  6. Leak test the system.
  7. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.